code: def push(self, d):
      width, _, _ = d.shapesize()
      # align blocks by the bottom edge
      y_offset = width / 2 * 20
      d.sety(self.y + y_offset)
      d.setx(self.x + 34 * len(self))
      self.append(d)
  
imports: from turtle import *
  import random
label_desc: Use image node_id 2 for calling the Shelf obj's underlying member method code with example usage: obj.push(d) without return types